Tape the paper squarely and securely to the stone. Use plenty of tape to make sure the paper doesn't slip while rubbing, as this will cause a blurred or double-image effect. Make sure that the paper covers the stone entirely so that you won't get marks on it.
Start on the outer edges. Block in the basic design of the rubbing, using a broad flat edge of your rubbing wax or crayon. The large fat crayons work well if you don't have rubbing wax.